<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Make Controller Kit - Firmware API: SAM7_EMAC.c Source File</title>
<link href="mt_doxygen.css" rel="stylesheet" type="text/css" />
<link href="../resources/mt_doxytabs.css" rel="stylesheet" type="text/css" />
<style type="text/css">
<!--
.header {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 12pt;
	color: #222222;
}
-->
</style>
</head>

<body>
<table width="800" border="0">
    <tr>
      <td colspan="3">
        <form method="get" action="http://www.google.com/search">
          <div align="right">
            <input type="text"   name="q" size="25"
              maxlength="255" value="" />
            <input type="submit" value="Search" />
            <input type="hidden" name="sitesearch" value="makingthings.com/ref/firmware/html" />
          </div>
        </form>
       </td>
    </tr>
    <tr>
      <td><div align="center"><a href="http://www.makingthings.com">
				<img src="../resources/logo_brown_medium.png" alt="MakingThings"
									width="200" height="78" border="0" align="middle" longdesc="http://www.makingthings.com" /></a></div></td>
				<td><div align="center" class="header">
      		Make Controller Kit <br />
          Firmware API
      </div></td>
      <td><div align="center"><a href="http://www.makezine.com">
					<img src="../resources/make_logo.png" alt="MAKE Zine" 
										width="164" height="73" border="0" align="middle" longdesc="http://www.makezine.com" /></a></div></td>
    </tr>
</table>
</body>
</html>
<!-- Generated by Doxygen 1.5.4 -->
<script type="text/javascript">
<!--
function changeDisplayState (e){
  var num=this.id.replace(/[^[0-9]/g,'');
  var button=this.firstChild;
  var sectionDiv=document.getElementById('dynsection'+num);
  if (sectionDiv.style.display=='none'||sectionDiv.style.display==''){
    sectionDiv.style.display='block';
    button.src='open.gif';
  }else{
    sectionDiv.style.display='none';
    button.src='closed.gif';
  }
}
function initDynSections(){
  var divs=document.getElementsByTagName('div');
  var sectionCounter=1;
  for(var i=0;i<divs.length-1;i++){
    if(divs[i].className=='dynheader'&&divs[i+1].className=='dynsection'){
      var header=divs[i];
      var section=divs[i+1];
      var button=header.firstChild;
      if (button!='IMG'){
        divs[i].insertBefore(document.createTextNode(' '),divs[i].firstChild);
        button=document.createElement('img');
        divs[i].insertBefore(button,divs[i].firstChild);
      }
      header.style.cursor='pointer';
      header.onclick=changeDisplayState;
      header.id='dynheader'+sectionCounter;
      button.src='closed.gif';
      section.id='dynsection'+sectionCounter;
      section.style.display='none';
      section.style.marginLeft='14px';
      sectionCounter++;
    }
  }
}
window.onload = initDynSections;
-->
</script>
<div class="tabs">
  <ul>
    <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
    <li><a href="modules.html"><span>Modules</span></a></li>
    <li><a href="classes.html"><span>Data&nbsp;Structures</span></a></li>
    <li class="current"><a href="files.html"><span>Files</span></a></li>
    <li><a href="pages.html"><span>Related&nbsp;Pages</span></a></li>
  </ul>
</div>
<h1>SAM7_EMAC.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">  FreeRTOS.org V4.6.0 - Copyright (C) 2003-2007 Richard Barry.</span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment">  This file is part of the FreeRTOS.org distribution.</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment">  FreeRTOS.org is free software; you can redistribute it and/or modify</span>
<a name="l00007"></a>00007 <span class="comment">  it under the terms of the GNU General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment">  the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00009"></a>00009 <span class="comment">  (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment">  FreeRTOS.org is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00014"></a>00014 <span class="comment">  GNU General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment">  You should have received a copy of the GNU General Public License</span>
<a name="l00017"></a>00017 <span class="comment">  along with FreeRTOS.org; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment">  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment">  A special exception to the GPL can be applied should you wish to distribute</span>
<a name="l00021"></a>00021 <span class="comment">  a combined work that includes FreeRTOS.org, without being obliged to provide</span>
<a name="l00022"></a>00022 <span class="comment">  the source code for any proprietary components.  See the licensing section</span>
<a name="l00023"></a>00023 <span class="comment">  of http://www.FreeRTOS.org for full details of how and when the exception</span>
<a name="l00024"></a>00024 <span class="comment">  can be applied.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">  ***************************************************************************</span>
<a name="l00027"></a>00027 <span class="comment">  See http://www.FreeRTOS.org for documentation, latest information, license</span>
<a name="l00028"></a>00028 <span class="comment">  and contact details.  Please ensure to read the configuration and relevant</span>
<a name="l00029"></a>00029 <span class="comment">  port sections of the online documentation.</span>
<a name="l00030"></a>00030 <span class="comment"></span>
<a name="l00031"></a>00031 <span class="comment">  Also see http://www.SafeRTOS.com for an IEC 61508 compliant version along</span>
<a name="l00032"></a>00032 <span class="comment">  with commercial development and support options.</span>
<a name="l00033"></a>00033 <span class="comment">  ***************************************************************************</span>
<a name="l00034"></a>00034 <span class="comment">*/</span>
<a name="l00035"></a>00035 
<a name="l00036"></a>00036 <span class="comment">/*</span>
<a name="l00037"></a>00037 <span class="comment"> * Interrupt driven driver for the EMAC peripheral.  This driver is not</span>
<a name="l00038"></a>00038 <span class="comment"> * reentrant, re-entrancy is handled by a semaphore at the network interface</span>
<a name="l00039"></a>00039 <span class="comment"> * level. </span>
<a name="l00040"></a>00040 <span class="comment"> */</span>
<a name="l00041"></a>00041 
<a name="l00042"></a>00042 
<a name="l00043"></a>00043 <span class="comment">/*</span>
<a name="l00044"></a>00044 <span class="comment">Changes from V3.2.2</span>
<a name="l00045"></a>00045 <span class="comment"></span>
<a name="l00046"></a>00046 <span class="comment">  + Corrected the byte order when writing the MAC address to the MAC.</span>
<a name="l00047"></a>00047 <span class="comment">  + Support added for MII interfaces.  Previously only RMII was supported.</span>
<a name="l00048"></a>00048 <span class="comment"></span>
<a name="l00049"></a>00049 <span class="comment">Changes from V3.2.3</span>
<a name="l00050"></a>00050 <span class="comment"></span>
<a name="l00051"></a>00051 <span class="comment">  + The MII interface is now the default.</span>
<a name="l00052"></a>00052 <span class="comment">  + Modified the initialisation sequence slightly to allow auto init more</span>
<a name="l00053"></a>00053 <span class="comment">    time to complete.</span>
<a name="l00054"></a>00054 <span class="comment"></span>
<a name="l00055"></a>00055 <span class="comment">Changes from V4.0.1</span>
<a name="l00056"></a>00056 <span class="comment"></span>
<a name="l00057"></a>00057 <span class="comment">  + Made the function vClearEMACTxBuffer() more robust by moving the index</span>
<a name="l00058"></a>00058 <span class="comment">    manipulation into the if() statement.  This allows the tx interrupt to</span>
<a name="l00059"></a>00059 <span class="comment">    execute even when there is no data to handle.</span>
<a name="l00060"></a>00060 <span class="comment"></span>
<a name="l00061"></a>00061 <span class="comment">Changes from V4.0.4</span>
<a name="l00062"></a>00062 <span class="comment"></span>
<a name="l00063"></a>00063 <span class="comment">  + Corrected the Rx frame length mask when obtaining the length from the</span>
<a name="l00064"></a>00064 <span class="comment">    rx descriptor.</span>
<a name="l00065"></a>00065 <span class="comment">*/</span>
<a name="l00066"></a>00066 
<a name="l00067"></a>00067 <span class="preprocessor">#include "config.h"</span> <span class="comment">// MakingThings.</span>
<a name="l00068"></a>00068 <span class="preprocessor">#ifdef MAKE_CTRL_NETWORK</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span>
<a name="l00070"></a>00070 <span class="comment">/* Standard includes. */</span>
<a name="l00071"></a>00071 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="comment">/* Scheduler includes. */</span>
<a name="l00074"></a>00074 <span class="preprocessor">#include "FreeRTOS.h"</span>
<a name="l00075"></a>00075 <span class="preprocessor">#include "semphr.h"</span>
<a name="l00076"></a>00076 <span class="preprocessor">#include "task.h"</span>
<a name="l00077"></a>00077 
<a name="l00078"></a>00078 <span class="comment">/* Demo app includes. */</span>
<a name="l00079"></a>00079 <span class="preprocessor">#include "SAM7_EMAC.h"</span>
<a name="l00080"></a>00080 
<a name="l00081"></a>00081 <span class="comment">/* Hardware specific includes. */</span>
<a name="l00082"></a>00082 <span class="preprocessor">#include "Emac.h"</span>
<a name="l00083"></a>00083 <span class="preprocessor">#include "mii.h"</span>
<a name="l00084"></a>00084 <span class="preprocessor">#include "AT91SAM7X256.h"</span>
<a name="l00085"></a>00085 
<a name="l00086"></a>00086 <span class="comment">/* MAKINGTHING: ADDED */</span>
<a name="l00087"></a>00087 
<a name="l00088"></a>00088 <span class="preprocessor">#include "Board.h"</span>
<a name="l00089"></a>00089 
<a name="l00090"></a>00090 <span class="comment">/* USE_RMII_INTERFACE must be defined as 1 to use an RMII interface, or 0</span>
<a name="l00091"></a>00091 <span class="comment">to use an MII interface. */</span>
<a name="l00092"></a>00092 <span class="comment">/* MAKINGTHINGS: Make Sure we're using RMII for Version 90 */</span>
<a name="l00093"></a>00093 <span class="preprocessor">#if ( CONTROLLER_VERSION == 50 || CONTROLLER_VERSION == 100 )</span>
<a name="l00094"></a>00094 <span class="preprocessor"></span><span class="preprocessor"> #define USE_RMII_INTERFACE 0</span>
<a name="l00095"></a>00095 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00096"></a>00096 <span class="preprocessor"></span><span class="preprocessor">#if ( CONTROLLER_VERSION == 90 || CONTROLLER_VERSION == 95 )</span>
<a name="l00097"></a>00097 <span class="preprocessor"></span><span class="preprocessor">  #define USE_RMII_INTERFACE 1</span>
<a name="l00098"></a>00098 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00099"></a>00099 <span class="preprocessor"></span>
<a name="l00100"></a>00100 <span class="comment">/* The buffer addresses written into the descriptors must be aligned so the</span>
<a name="l00101"></a>00101 <span class="comment">last few bits are zero.  These bits have special meaning for the EMAC</span>
<a name="l00102"></a>00102 <span class="comment">peripheral and cannot be used as part of the address. */</span>
<a name="l00103"></a>00103 <span class="preprocessor">#define emacADDRESS_MASK      ( ( unsigned portLONG ) 0xFFFFFFFC )</span>
<a name="l00104"></a>00104 <span class="preprocessor"></span>
<a name="l00105"></a>00105 <span class="comment">/* Bit used within the address stored in the descriptor to mark the last</span>
<a name="l00106"></a>00106 <span class="comment">descriptor in the array. */</span>
<a name="l00107"></a>00107 <span class="preprocessor">#define emacRX_WRAP_BIT       ( ( unsigned portLONG ) 0x02 )</span>
<a name="l00108"></a>00108 <span class="preprocessor"></span>
<a name="l00109"></a>00109 <span class="comment">/* Bit used within the Tx descriptor status to indicate whether the</span>
<a name="l00110"></a>00110 <span class="comment">descriptor is under the control of the EMAC or the software. */</span>
<a name="l00111"></a>00111 <span class="preprocessor">#define emacTX_BUF_USED       ( ( unsigned portLONG ) 0x80000000 )</span>
<a name="l00112"></a>00112 <span class="preprocessor"></span>
<a name="l00113"></a>00113 <span class="comment">/* A short delay is used to wait for a buffer to become available, should</span>
<a name="l00114"></a>00114 <span class="comment">one not be immediately available when trying to transmit a frame. */</span>
<a name="l00115"></a>00115 <span class="preprocessor">#define emacBUFFER_WAIT_DELAY   ( 2 )</span>
<a name="l00116"></a>00116 <span class="preprocessor"></span><span class="preprocessor">#define emacMAX_WAIT_CYCLES     ( ( portBASE_TYPE ) ( configTICK_RATE_HZ / 40 ) )</span>
<a name="l00117"></a>00117 <span class="preprocessor"></span>
<a name="l00118"></a>00118 <span class="comment">/* The time to block waiting for input. */</span>
<a name="l00119"></a>00119 <span class="preprocessor">#define emacBLOCK_TIME_WAITING_FOR_INPUT  ( ( portTickType ) 100 )</span>
<a name="l00120"></a>00120 <span class="preprocessor"></span>
<a name="l00121"></a>00121 <span class="comment">/* Peripheral setup for the EMAC. */</span>
<a name="l00122"></a>00122 
<a name="l00123"></a>00123 <span class="comment">/* MAKINGTHINGS: ADDITION */</span>
<a name="l00124"></a>00124 <span class="preprocessor">#if ( CONTROLLER_VERSION == 50 || CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span><span class="preprocessor">  #define emacPERIPHERAL_A_SETUP    \</span>
<a name="l00126"></a>00126 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB2_ETX0 ) | \</span>
<a name="l00127"></a>00127 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB3_ETX1      ) | \</span>
<a name="l00128"></a>00128 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB10_ETX2     ) | \</span>
<a name="l00129"></a>00129 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB11_ETX3     ) | \</span>
<a name="l00130"></a>00130 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB12_ETXER    ) | \</span>
<a name="l00131"></a>00131 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB1_ETXEN     ) | \</span>
<a name="l00132"></a>00132 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB0_ETXCK_EREFCK  ) | \</span>
<a name="l00133"></a>00133 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB16_ECOL     ) | \</span>
<a name="l00134"></a>00134 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB5_ERX0      ) | \</span>
<a name="l00135"></a>00135 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB6_ERX1      ) | \</span>
<a name="l00136"></a>00136 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB13_ERX2     ) | \</span>
<a name="l00137"></a>00137 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB14_ERX3     ) | \</span>
<a name="l00138"></a>00138 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB15_ERXDV    ) | \</span>
<a name="l00139"></a>00139 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB8_EMDC      ) | \</span>
<a name="l00140"></a>00140 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB4_ECRS_ECRSDV ) | \</span>
<a name="l00141"></a>00141 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB9_EMDIO     ) | \</span>
<a name="l00142"></a>00142 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB7_ERXER     ) | \</span>
<a name="l00143"></a>00143 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB17_ERXCK    );</span>
<a name="l00144"></a>00144 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00145"></a>00145 <span class="preprocessor"></span><span class="preprocessor">#if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00146"></a>00146 <span class="preprocessor"></span><span class="preprocessor">#define emacPERIPHERAL_A_SETUP  \</span>
<a name="l00147"></a>00147 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB2_ETX0  ) | \</span>
<a name="l00148"></a>00148 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB6_ERX1      ) | \</span>
<a name="l00149"></a>00149 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB15_ERXDV    ) | \</span>
<a name="l00150"></a>00150 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB3_ETX1      ) | \</span>
<a name="l00151"></a>00151 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB8_EMDC      ) | \</span>
<a name="l00152"></a>00152 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB4_ECRS_ECRSDV ) | \</span>
<a name="l00153"></a>00153 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB5_ERX0      ) | \</span>
<a name="l00154"></a>00154 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB1_ETXEN     ) | \</span>
<a name="l00155"></a>00155 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB0_ETXCK_EREFCK  ) | \</span>
<a name="l00156"></a>00156 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB9_EMDIO     ) | \</span>
<a name="l00157"></a>00157 <span class="preprocessor">      ( ( unsigned portLONG ) AT91C_PB7_ERXER     );</span>
<a name="l00158"></a>00158 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00159"></a>00159 <span class="preprocessor"></span>
<a name="l00160"></a>00160 <span class="comment">/* Misc defines. */</span>
<a name="l00161"></a>00161 <span class="preprocessor">#define emacINTERRUPT_LEVEL     ( 5 )</span>
<a name="l00162"></a>00162 <span class="preprocessor"></span><span class="preprocessor">#define emacNO_DELAY        ( 0 )</span>
<a name="l00163"></a>00163 <span class="preprocessor"></span><span class="preprocessor">#define emacTOTAL_FRAME_HEADER_SIZE ( 54 )</span>
<a name="l00164"></a>00164 <span class="preprocessor"></span><span class="preprocessor">#define emacPHY_INIT_DELAY      ( 5000 / portTICK_RATE_MS )</span>
<a name="l00165"></a>00165 <span class="preprocessor"></span><span class="preprocessor">#define emacRESET_KEY       ( ( unsigned portLONG ) 0xA5000000 )</span>
<a name="l00166"></a>00166 <span class="preprocessor"></span><span class="preprocessor">#define emacRESET_LENGTH      ( ( unsigned portLONG ) ( 0x01 &lt;&lt; 8 ) )</span>
<a name="l00167"></a>00167 <span class="preprocessor"></span>
<a name="l00168"></a>00168 <span class="comment">/* The Atmel header file only defines the TX frame length mask. */</span>
<a name="l00169"></a>00169 <span class="preprocessor">#define emacRX_LENGTH_FRAME     ( 0xfff )</span>
<a name="l00170"></a>00170 <span class="preprocessor"></span>
<a name="l00171"></a>00171 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00172"></a>00172 
<a name="l00173"></a>00173 <span class="comment">/* Buffer written to by the EMAC DMA.  Must be aligned as described by the</span>
<a name="l00174"></a>00174 <span class="comment">comment above the emacADDRESS_MASK definition. */</span>
<a name="l00175"></a>00175 <span class="keyword">static</span> <span class="keyword">volatile</span> portCHAR pcRxBuffer[ NB_RX_BUFFERS * ETH_RX_BUFFER_SIZE ] __attribute__ ((aligned (8)));
<a name="l00176"></a>00176 
<a name="l00177"></a>00177 <span class="comment">/* Buffer read by the EMAC DMA.  Must be aligned as described by the comment</span>
<a name="l00178"></a>00178 <span class="comment">above the emacADDRESS_MASK definition. */</span>
<a name="l00179"></a>00179 <span class="keyword">static</span> portCHAR pcTxBuffer[ NB_TX_BUFFERS * ETH_TX_BUFFER_SIZE ] __attribute__ ((aligned (8)));
<a name="l00180"></a>00180 
<a name="l00181"></a>00181 <span class="comment">/* Descriptors used to communicate between the program and the EMAC peripheral.</span>
<a name="l00182"></a>00182 <span class="comment">These descriptors hold the locations and state of the Rx and Tx buffers. */</span>
<a name="l00183"></a>00183 <span class="keyword">static</span> <span class="keyword">volatile</span> AT91S_TxTdDescriptor xTxDescriptors[ NB_TX_BUFFERS ];
<a name="l00184"></a>00184 <span class="keyword">static</span> <span class="keyword">volatile</span> AT91S_RxTdDescriptor xRxDescriptors[ NB_RX_BUFFERS ];
<a name="l00185"></a>00185 
<a name="l00186"></a>00186 <span class="comment">/* The IP and Ethernet addresses are read from the header files. */</span>
<a name="l00187"></a>00187 <span class="comment">/* MakingThings: commented this out to accomodate being able to change the MAC address */</span>
<a name="l00188"></a>00188 <span class="comment">//const portCHAR cMACAddress[ 6 ] = { emacETHADDR0, emacETHADDR1, emacETHADDR2, emacETHADDR3, emacETHADDR4, emacETHADDR5 };</span>
<a name="l00189"></a>00189 <span class="comment">//const unsigned char ucIPAddress[ 4 ]  = { emacIPADDR0, emacIPADDR1, emacIPADDR2, emacIPADDR3 };</span>
<a name="l00190"></a>00190 
<a name="l00191"></a>00191 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00192"></a>00192 
<a name="l00193"></a>00193 <span class="comment">/* See the header file for descriptions of public functions. */</span>
<a name="l00194"></a>00194 
<a name="l00195"></a>00195 <span class="comment">/*</span>
<a name="l00196"></a>00196 <span class="comment"> * Prototype for the EMAC interrupt function.</span>
<a name="l00197"></a>00197 <span class="comment"> */</span>
<a name="l00198"></a>00198 <span class="keywordtype">void</span> vEMACISR_Wrapper( <span class="keywordtype">void</span> ) __attribute__ ((naked));
<a name="l00199"></a>00199 
<a name="l00200"></a>00200 <span class="comment">/*</span>
<a name="l00201"></a>00201 <span class="comment"> * Initialise both the Tx and Rx descriptors used by the EMAC.</span>
<a name="l00202"></a>00202 <span class="comment"> */</span>
<a name="l00203"></a>00203 static <span class="keywordtype">void</span> prvSetupDescriptors(<span class="keywordtype">void</span>);
<a name="l00204"></a>00204 
<a name="l00205"></a>00205 <span class="comment">/*</span>
<a name="l00206"></a>00206 <span class="comment"> * Write our MAC address into the EMAC.  </span>
<a name="l00207"></a>00207 <span class="comment"> */</span>
<a name="l00208"></a>00208 static <span class="keywordtype">void</span> prvSetupMACAddress( <span class="keywordtype">void</span> );
<a name="l00209"></a>00209 
<a name="l00210"></a>00210 <span class="comment">/*</span>
<a name="l00211"></a>00211 <span class="comment"> * Configure the EMAC and AIC for EMAC interrupts.</span>
<a name="l00212"></a>00212 <span class="comment"> */</span>
<a name="l00213"></a>00213 static <span class="keywordtype">void</span> prvSetupEMACInterrupt( <span class="keywordtype">void</span> );
<a name="l00214"></a>00214 
<a name="l00215"></a>00215 <span class="comment">/*</span>
<a name="l00216"></a>00216 <span class="comment"> * Some initialisation functions taken from the Atmel EMAC sample code.</span>
<a name="l00217"></a>00217 <span class="comment"> */</span>
<a name="l00218"></a>00218 static <span class="keywordtype">void</span> vReadPHY( <span class="keywordtype">unsigned</span> portCHAR ucPHYAddress, <span class="keywordtype">unsigned</span> portCHAR ucAddress, <span class="keywordtype">unsigned</span> portLONG *pulValue );
<a name="l00219"></a>00219 static portBASE_TYPE xGetLinkSpeed( <span class="keywordtype">void</span> );
<a name="l00220"></a>00220 static portBASE_TYPE prvProbePHY( <span class="keywordtype">void</span> );
<a name="l00221"></a>00221 <span class="preprocessor">#if USE_RMII_INTERFACE != 1</span>
<a name="l00222"></a>00222 <span class="preprocessor"></span>  <span class="keyword">static</span> <span class="keywordtype">void</span> vWritePHY( <span class="keywordtype">unsigned</span> portCHAR ucPHYAddress, <span class="keywordtype">unsigned</span> portCHAR ucAddress, <span class="keywordtype">unsigned</span> portLONG ulValue);
<a name="l00223"></a>00223 <span class="preprocessor">#endif</span>
<a name="l00224"></a>00224 <span class="preprocessor"></span>
<a name="l00225"></a>00225 
<a name="l00226"></a>00226 <span class="comment">/* The semaphore used by the EMAC ISR to wake the EMAC task. */</span>
<a name="l00227"></a>00227 <span class="keyword">static</span> xSemaphoreHandle xSemaphore = NULL;
<a name="l00228"></a>00228 
<a name="l00229"></a>00229 <span class="comment">/* Holds the index to the next buffer from which data will be read. */</span>
<a name="l00230"></a>00230 <span class="keyword">static</span> <span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> portLONG ulNextRxBuffer = 0;
<a name="l00231"></a>00231 
<a name="l00232"></a>00232 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00233"></a>00233 
<a name="l00234"></a>00234 <span class="comment">/* See the header file for descriptions of public functions. */</span>
<a name="l00235"></a>00235 portLONG lEMACSend( portCHAR *pcFrom, <span class="keywordtype">unsigned</span> portLONG ulLength, portLONG lEndOfFrame )
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> portBASE_TYPE uxTxBufferIndex = 0;
<a name="l00238"></a>00238 portBASE_TYPE xWaitCycles = 0;
<a name="l00239"></a>00239 portLONG lReturn = pdPASS;
<a name="l00240"></a>00240 portCHAR *pcBuffer;
<a name="l00241"></a>00241 <span class="keywordtype">unsigned</span> portLONG ulLastBuffer, ulDataBuffered = 0, ulDataRemainingToSend, ulLengthToSend;
<a name="l00242"></a>00242 
<a name="l00243"></a>00243   <span class="comment">/* If the length of data to be transmitted is greater than each individual</span>
<a name="l00244"></a>00244 <span class="comment">  transmit buffer then the data will be split into more than one buffer.</span>
<a name="l00245"></a>00245 <span class="comment">  Loop until the entire length has been buffered. */</span>
<a name="l00246"></a>00246   <span class="keywordflow">while</span>( ulDataBuffered &lt; ulLength )
<a name="l00247"></a>00247   {
<a name="l00248"></a>00248     <span class="comment">/* Is a buffer available? */</span>
<a name="l00249"></a>00249     <span class="keywordflow">while</span>( !( xTxDescriptors[ uxTxBufferIndex ].U_Status.status &amp; AT91C_TRANSMIT_OK ) )
<a name="l00250"></a>00250     {
<a name="l00251"></a>00251       <span class="comment">/* There is no room to write the Tx data to the Tx buffer.  Wait a</span>
<a name="l00252"></a>00252 <span class="comment">      short while, then try again. */</span>
<a name="l00253"></a>00253       xWaitCycles++;
<a name="l00254"></a>00254       <span class="keywordflow">if</span>( xWaitCycles &gt; emacMAX_WAIT_CYCLES )
<a name="l00255"></a>00255       {
<a name="l00256"></a>00256         <span class="comment">/* Give up. */</span>
<a name="l00257"></a>00257         lReturn = pdFAIL;
<a name="l00258"></a>00258         <span class="keywordflow">break</span>;
<a name="l00259"></a>00259       }
<a name="l00260"></a>00260       <span class="keywordflow">else</span>
<a name="l00261"></a>00261       {
<a name="l00262"></a>00262         vTaskDelay( emacBUFFER_WAIT_DELAY );
<a name="l00263"></a>00263       }
<a name="l00264"></a>00264     }
<a name="l00265"></a>00265   
<a name="l00266"></a>00266     <span class="comment">/* lReturn will only be pdPASS if a buffer is available. */</span>
<a name="l00267"></a>00267     <span class="keywordflow">if</span>( lReturn == pdPASS )
<a name="l00268"></a>00268     {
<a name="l00269"></a>00269       portENTER_CRITICAL();
<a name="l00270"></a>00270       {
<a name="l00271"></a>00271         <span class="comment">/* Get the address of the buffer from the descriptor, then copy </span>
<a name="l00272"></a>00272 <span class="comment">        the data into the buffer. */</span>
<a name="l00273"></a>00273         pcBuffer = ( portCHAR * ) xTxDescriptors[ uxTxBufferIndex ].addr;
<a name="l00274"></a>00274 
<a name="l00275"></a>00275         <span class="comment">/* How much can we write to the buffer? */</span>
<a name="l00276"></a>00276         ulDataRemainingToSend = ulLength - ulDataBuffered;
<a name="l00277"></a>00277         <span class="keywordflow">if</span>( ulDataRemainingToSend &lt;= ETH_TX_BUFFER_SIZE )
<a name="l00278"></a>00278         {
<a name="l00279"></a>00279           <span class="comment">/* We can write all the remaining bytes. */</span>
<a name="l00280"></a>00280           ulLengthToSend = ulDataRemainingToSend;
<a name="l00281"></a>00281         }
<a name="l00282"></a>00282         <span class="keywordflow">else</span>
<a name="l00283"></a>00283         {
<a name="l00284"></a>00284           <span class="comment">/* We can not write more than ETH_TX_BUFFER_SIZE in one go. */</span>
<a name="l00285"></a>00285           ulLengthToSend = ETH_TX_BUFFER_SIZE;
<a name="l00286"></a>00286         }
<a name="l00287"></a>00287 
<a name="l00288"></a>00288         <span class="comment">/* Copy the data into the buffer. */</span>
<a name="l00289"></a>00289         memcpy( ( <span class="keywordtype">void</span> * ) pcBuffer, ( <span class="keywordtype">void</span> * ) &amp;( pcFrom[ ulDataBuffered ] ), ulLengthToSend );
<a name="l00290"></a>00290         ulDataBuffered += ulLengthToSend;
<a name="l00291"></a>00291 
<a name="l00292"></a>00292         <span class="comment">/* Is this the last data for the frame? */</span>
<a name="l00293"></a>00293         <span class="keywordflow">if</span>( lEndOfFrame &amp;&amp; ( ulDataBuffered &gt;= ulLength ) )
<a name="l00294"></a>00294         {
<a name="l00295"></a>00295           <span class="comment">/* No more data remains for this frame so we can start the </span>
<a name="l00296"></a>00296 <span class="comment">          transmission. */</span>
<a name="l00297"></a>00297           ulLastBuffer = AT91C_LAST_BUFFER;
<a name="l00298"></a>00298         }
<a name="l00299"></a>00299         <span class="keywordflow">else</span>
<a name="l00300"></a>00300         {
<a name="l00301"></a>00301           <span class="comment">/* More data to come for this frame. */</span>
<a name="l00302"></a>00302           ulLastBuffer = 0;
<a name="l00303"></a>00303         }
<a name="l00304"></a>00304   
<a name="l00305"></a>00305         <span class="comment">/* Fill out the necessary in the descriptor to get the data sent, </span>
<a name="l00306"></a>00306 <span class="comment">        then move to the next descriptor, wrapping if necessary. */</span>
<a name="l00307"></a>00307         <span class="keywordflow">if</span>( uxTxBufferIndex &gt;= ( NB_TX_BUFFERS - 1 ) )
<a name="l00308"></a>00308         {       
<a name="l00309"></a>00309           xTxDescriptors[ uxTxBufferIndex ].U_Status.status =   ( ulLengthToSend &amp; ( <span class="keywordtype">unsigned</span> portLONG ) AT91C_LENGTH_FRAME )
<a name="l00310"></a>00310                                       | ulLastBuffer
<a name="l00311"></a>00311                                       | AT91C_TRANSMIT_WRAP;
<a name="l00312"></a>00312           uxTxBufferIndex = 0;
<a name="l00313"></a>00313         }
<a name="l00314"></a>00314         <span class="keywordflow">else</span>
<a name="l00315"></a>00315         {
<a name="l00316"></a>00316           xTxDescriptors[ uxTxBufferIndex ].U_Status.status =   ( ulLengthToSend &amp; ( <span class="keywordtype">unsigned</span> portLONG ) AT91C_LENGTH_FRAME )
<a name="l00317"></a>00317                                       | ulLastBuffer;
<a name="l00318"></a>00318           uxTxBufferIndex++;
<a name="l00319"></a>00319         }
<a name="l00320"></a>00320   
<a name="l00321"></a>00321         <span class="comment">/* If this is the last buffer to be sent for this frame we can</span>
<a name="l00322"></a>00322 <span class="comment">        start the transmission. */</span>
<a name="l00323"></a>00323         <span class="keywordflow">if</span>( ulLastBuffer )
<a name="l00324"></a>00324         {
<a name="l00325"></a>00325           AT91C_BASE_EMAC-&gt;EMAC_NCR |= AT91C_EMAC_TSTART;
<a name="l00326"></a>00326         }
<a name="l00327"></a>00327       }
<a name="l00328"></a>00328       portEXIT_CRITICAL();
<a name="l00329"></a>00329     }
<a name="l00330"></a>00330     <span class="keywordflow">else</span>
<a name="l00331"></a>00331     {
<a name="l00332"></a>00332       <span class="keywordflow">break</span>;
<a name="l00333"></a>00333     }
<a name="l00334"></a>00334   }
<a name="l00335"></a>00335 
<a name="l00336"></a>00336   <span class="keywordflow">return</span> lReturn;
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00339"></a>00339 
<a name="l00340"></a>00340 <span class="comment">/* See the header file for descriptions of public functions. */</span>
<a name="l00341"></a>00341 <span class="keywordtype">unsigned</span> portLONG ulEMACInputLength( <span class="keywordtype">void</span> )
<a name="l00342"></a>00342 {
<a name="l00343"></a>00343 <span class="keyword">register</span> <span class="keywordtype">unsigned</span> portLONG ulIndex, ulLength = 0;
<a name="l00344"></a>00344 
<a name="l00345"></a>00345   <span class="comment">/* Skip any fragments.  We are looking for the first buffer that contains</span>
<a name="l00346"></a>00346 <span class="comment">  data and has the SOF (start of frame) bit set. */</span>
<a name="l00347"></a>00347   <span class="keywordflow">while</span>( ( xRxDescriptors[ ulNextRxBuffer ].addr &amp; AT91C_OWNERSHIP_BIT ) &amp;&amp; !( xRxDescriptors[ ulNextRxBuffer ].U_Status.status &amp; AT91C_SOF ) )
<a name="l00348"></a>00348   {
<a name="l00349"></a>00349     <span class="comment">/* Ignoring this buffer.  Mark it as free again. */</span>
<a name="l00350"></a>00350     xRxDescriptors[ ulNextRxBuffer ].addr &amp;= ~( AT91C_OWNERSHIP_BIT );    
<a name="l00351"></a>00351     ulNextRxBuffer++;
<a name="l00352"></a>00352     <span class="keywordflow">if</span>( ulNextRxBuffer &gt;= NB_RX_BUFFERS )
<a name="l00353"></a>00353     {
<a name="l00354"></a>00354       ulNextRxBuffer = 0;
<a name="l00355"></a>00355     }
<a name="l00356"></a>00356   }
<a name="l00357"></a>00357 
<a name="l00358"></a>00358   <span class="comment">/* We are going to walk through the descriptors that make up this frame, </span>
<a name="l00359"></a>00359 <span class="comment">  but don't want to alter ulNextRxBuffer as this would prevent vEMACRead()</span>
<a name="l00360"></a>00360 <span class="comment">  from finding the data.  Therefore use a copy of ulNextRxBuffer instead. */</span>
<a name="l00361"></a>00361   ulIndex = ulNextRxBuffer;
<a name="l00362"></a>00362 
<a name="l00363"></a>00363   <span class="comment">/* Walk through the descriptors until we find the last buffer for this </span>
<a name="l00364"></a>00364 <span class="comment">  frame.  The last buffer will give us the length of the entire frame. */</span>
<a name="l00365"></a>00365   <span class="keywordflow">while</span>( ( xRxDescriptors[ ulIndex ].addr &amp; AT91C_OWNERSHIP_BIT ) &amp;&amp; !ulLength )
<a name="l00366"></a>00366   {
<a name="l00367"></a>00367     ulLength = xRxDescriptors[ ulIndex ].U_Status.status &amp; emacRX_LENGTH_FRAME;
<a name="l00368"></a>00368 
<a name="l00369"></a>00369     <span class="comment">/* Increment to the next buffer, wrapping if necessary. */</span>
<a name="l00370"></a>00370     ulIndex++;
<a name="l00371"></a>00371     <span class="keywordflow">if</span>( ulIndex &gt;= NB_RX_BUFFERS )
<a name="l00372"></a>00372     {
<a name="l00373"></a>00373       ulIndex = 0;
<a name="l00374"></a>00374     }
<a name="l00375"></a>00375   }
<a name="l00376"></a>00376 
<a name="l00377"></a>00377   <span class="keywordflow">return</span> ulLength;
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00380"></a>00380 
<a name="l00381"></a>00381 <span class="comment">/* See the header file for descriptions of public functions. */</span>
<a name="l00382"></a>00382 <span class="keywordtype">void</span> vEMACRead( portCHAR *pcTo, <span class="keywordtype">unsigned</span> portLONG ulSectionLength, <span class="keywordtype">unsigned</span> portLONG ulTotalFrameLength )
<a name="l00383"></a>00383 {
<a name="l00384"></a>00384 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> portLONG ulSectionBytesReadSoFar = 0, ulBufferPosition = 0, ulFameBytesReadSoFar = 0;
<a name="l00385"></a>00385 <span class="keyword">static</span> portCHAR *pcSource;
<a name="l00386"></a>00386 <span class="keyword">register</span> <span class="keywordtype">unsigned</span> portLONG ulBytesRemainingInBuffer, ulRemainingSectionBytes;
<a name="l00387"></a>00387 
<a name="l00388"></a>00388   <span class="comment">/* Read ulSectionLength bytes from the Rx buffers.  This is not necessarily any</span>
<a name="l00389"></a>00389 <span class="comment">  correspondence between the length of our Rx buffers, and the length of the</span>
<a name="l00390"></a>00390 <span class="comment">  data we are returning or the length of the data being requested.  Therefore, </span>
<a name="l00391"></a>00391 <span class="comment">  between calls  we have to remember not only which buffer we are currently </span>
<a name="l00392"></a>00392 <span class="comment">  processing, but our position within that buffer.  This would be greatly</span>
<a name="l00393"></a>00393 <span class="comment">  simplified if PBUF_POOL_BUFSIZE could be guaranteed to be greater than</span>
<a name="l00394"></a>00394 <span class="comment">  the size of each Rx buffer, and that memory fragmentation did not occur.</span>
<a name="l00395"></a>00395 <span class="comment">  </span>
<a name="l00396"></a>00396 <span class="comment">  This function should only be called after a call to ulEMACInputLength().</span>
<a name="l00397"></a>00397 <span class="comment">  This will ensure ulNextRxBuffer is set to the correct buffer. */</span>
<a name="l00398"></a>00398 
<a name="l00399"></a>00399 
<a name="l00400"></a>00400 
<a name="l00401"></a>00401   <span class="comment">/* vEMACRead is called with pcTo set to NULL to indicate that we are about</span>
<a name="l00402"></a>00402 <span class="comment">  to read a new frame.  Any fragments remaining in the frame we were </span>
<a name="l00403"></a>00403 <span class="comment">  processing during the last call should be dropped. */</span>
<a name="l00404"></a>00404   <span class="keywordflow">if</span>( pcTo == NULL )
<a name="l00405"></a>00405   {
<a name="l00406"></a>00406     <span class="comment">/* How many bytes are indicated as being in this buffer?  If none then</span>
<a name="l00407"></a>00407 <span class="comment">    the buffer is completely full and the frame is contained within more</span>
<a name="l00408"></a>00408 <span class="comment">    than one buffer. */</span>
<a name="l00409"></a>00409 
<a name="l00410"></a>00410     <span class="comment">/* Reset our state variables ready for the next read from this buffer. */</span>
<a name="l00411"></a>00411         pcSource = ( portCHAR * )( xRxDescriptors[ ulNextRxBuffer ].addr &amp; emacADDRESS_MASK );
<a name="l00412"></a>00412         ulFameBytesReadSoFar = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00413"></a>00413     ulBufferPosition = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00414"></a>00414   }
<a name="l00415"></a>00415   <span class="keywordflow">else</span>
<a name="l00416"></a>00416   {
<a name="l00417"></a>00417     <span class="comment">/* Loop until we have obtained the required amount of data. */</span>
<a name="l00418"></a>00418         ulSectionBytesReadSoFar = 0;
<a name="l00419"></a>00419     <span class="keywordflow">while</span>( ulSectionBytesReadSoFar &lt; ulSectionLength )
<a name="l00420"></a>00420     {
<a name="l00421"></a>00421       <span class="comment">/* We may have already read some data from this buffer.  How much</span>
<a name="l00422"></a>00422 <span class="comment">      data remains in the buffer? */</span>
<a name="l00423"></a>00423       ulBytesRemainingInBuffer = ( ETH_RX_BUFFER_SIZE - ulBufferPosition );
<a name="l00424"></a>00424 
<a name="l00425"></a>00425       <span class="comment">/* How many more bytes do we need to read before we have the </span>
<a name="l00426"></a>00426 <span class="comment">      required amount of data? */</span>
<a name="l00427"></a>00427             ulRemainingSectionBytes = ulSectionLength - ulSectionBytesReadSoFar;
<a name="l00428"></a>00428 
<a name="l00429"></a>00429       <span class="comment">/* Do we want more data than remains in the buffer? */</span>
<a name="l00430"></a>00430       <span class="keywordflow">if</span>( ulRemainingSectionBytes &gt; ulBytesRemainingInBuffer )
<a name="l00431"></a>00431       {
<a name="l00432"></a>00432         <span class="comment">/* We want more data than remains in the buffer so we can </span>
<a name="l00433"></a>00433 <span class="comment">        write the remains of the buffer to the destination, then move</span>
<a name="l00434"></a>00434 <span class="comment">        onto the next buffer to get the rest. */</span>
<a name="l00435"></a>00435         memcpy( &amp;( pcTo[ ulSectionBytesReadSoFar ] ), &amp;( pcSource[ ulBufferPosition ] ), ulBytesRemainingInBuffer );
<a name="l00436"></a>00436         ulSectionBytesReadSoFar += ulBytesRemainingInBuffer;
<a name="l00437"></a>00437                 ulFameBytesReadSoFar += ulBytesRemainingInBuffer;
<a name="l00438"></a>00438 
<a name="l00439"></a>00439         <span class="comment">/* Mark the buffer as free again. */</span>
<a name="l00440"></a>00440         xRxDescriptors[ ulNextRxBuffer ].addr &amp;= ~( AT91C_OWNERSHIP_BIT );
<a name="l00441"></a>00441 
<a name="l00442"></a>00442         <span class="comment">/* Move onto the next buffer. */</span>
<a name="l00443"></a>00443         ulNextRxBuffer++;
<a name="l00444"></a>00444         <span class="keywordflow">if</span>( ulNextRxBuffer &gt;= NB_RX_BUFFERS )
<a name="l00445"></a>00445         {
<a name="l00446"></a>00446           ulNextRxBuffer = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00447"></a>00447         }
<a name="l00448"></a>00448 
<a name="l00449"></a>00449         <span class="comment">/* Reset the variables for the new buffer. */</span>
<a name="l00450"></a>00450         pcSource = ( portCHAR * )( xRxDescriptors[ ulNextRxBuffer ].addr &amp; emacADDRESS_MASK );
<a name="l00451"></a>00451         ulBufferPosition = ( <span class="keywordtype">unsigned</span> portLONG ) 0;
<a name="l00452"></a>00452       }
<a name="l00453"></a>00453       <span class="keywordflow">else</span>
<a name="l00454"></a>00454       {
<a name="l00455"></a>00455         <span class="comment">/* We have enough data in this buffer to send back.  Read out</span>
<a name="l00456"></a>00456 <span class="comment">        enough data and remember how far we read up to. */</span>
<a name="l00457"></a>00457         memcpy( &amp;( pcTo[ ulSectionBytesReadSoFar ] ), &amp;( pcSource[ ulBufferPosition ] ), ulRemainingSectionBytes );
<a name="l00458"></a>00458 
<a name="l00459"></a>00459         <span class="comment">/* There may be more data in this buffer yet.  Increment our </span>
<a name="l00460"></a>00460 <span class="comment">        position in this buffer past the data we have just read. */</span>
<a name="l00461"></a>00461         ulBufferPosition += ulRemainingSectionBytes;
<a name="l00462"></a>00462         ulSectionBytesReadSoFar += ulRemainingSectionBytes;
<a name="l00463"></a>00463                 ulFameBytesReadSoFar += ulRemainingSectionBytes;
<a name="l00464"></a>00464 
<a name="l00465"></a>00465         <span class="comment">/* Have we now finished with this buffer? */</span>
<a name="l00466"></a>00466         <span class="keywordflow">if</span>( ( ulBufferPosition &gt;= ETH_RX_BUFFER_SIZE ) || ( ulFameBytesReadSoFar &gt;= ulTotalFrameLength ) )
<a name="l00467"></a>00467         {
<a name="l00468"></a>00468           <span class="comment">/* Mark the buffer as free again. */</span>
<a name="l00469"></a>00469           xRxDescriptors[ ulNextRxBuffer ].addr &amp;= ~( AT91C_OWNERSHIP_BIT );
<a name="l00470"></a>00470 
<a name="l00471"></a>00471           <span class="comment">/* Move onto the next buffer. */</span>
<a name="l00472"></a>00472           ulNextRxBuffer++;
<a name="l00473"></a>00473           <span class="keywordflow">if</span>( ulNextRxBuffer &gt;= NB_RX_BUFFERS )
<a name="l00474"></a>00474           {
<a name="l00475"></a>00475             ulNextRxBuffer = 0;
<a name="l00476"></a>00476           }
<a name="l00477"></a>00477   
<a name="l00478"></a>00478           pcSource = ( portCHAR * )( xRxDescriptors[ ulNextRxBuffer ].addr &amp; emacADDRESS_MASK );
<a name="l00479"></a>00479           ulBufferPosition = 0;
<a name="l00480"></a>00480         }
<a name="l00481"></a>00481       }
<a name="l00482"></a>00482     }
<a name="l00483"></a>00483   }
<a name="l00484"></a>00484 }
<a name="l00485"></a>00485 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00486"></a>00486 
<a name="l00487"></a>00487 <span class="comment">/* See the header file for descriptions of public functions. */</span>
<a name="l00488"></a>00488 xSemaphoreHandle xEMACInit( <span class="keywordtype">void</span> )
<a name="l00489"></a>00489 {
<a name="l00490"></a>00490   <span class="comment">/* Code supplied by Atmel -------------------------------*/</span>
<a name="l00491"></a>00491 
<a name="l00492"></a>00492   <span class="comment">/* Disable pull up on RXDV =&gt; PHY normal mode (not in test mode),</span>
<a name="l00493"></a>00493 <span class="comment">  PHY has internal pull down. */</span>
<a name="l00494"></a>00494   AT91C_BASE_PIOB-&gt;PIO_PPUDR = 1 &lt;&lt; 15;
<a name="l00495"></a>00495 
<a name="l00496"></a>00496 <span class="preprocessor">  #if USE_RMII_INTERFACE != 1</span>
<a name="l00497"></a>00497 <span class="preprocessor"></span>      <span class="comment">/* PHY has internal pull down : set MII mode. */</span>
<a name="l00498"></a>00498       AT91C_BASE_PIOB-&gt;PIO_PPUDR = 1 &lt;&lt; 16;
<a name="l00499"></a>00499 <span class="preprocessor">  #endif</span>
<a name="l00500"></a>00500 <span class="preprocessor"></span>
<a name="l00501"></a>00501   <span class="comment">/* MAKINGTHINGS: ADDITION */</span>
<a name="l00502"></a>00502   <span class="comment">/* Clear PB18 &lt;=&gt; PHY power up. */</span>
<a name="l00503"></a>00503 <span class="preprocessor">  #if ( CONTROLLER_VERSION == 50 || CONTROLLER_VERSION == 95 || CONTROLLER_VERSION == 100 )</span>
<a name="l00504"></a>00504 <span class="preprocessor"></span>    AT91C_BASE_PIOB-&gt;PIO_PER = 1 &lt;&lt; 18;
<a name="l00505"></a>00505   AT91C_BASE_PIOB-&gt;PIO_OER = 1 &lt;&lt; 18;
<a name="l00506"></a>00506   AT91C_BASE_PIOB-&gt;PIO_CODR = 1 &lt;&lt; 18;
<a name="l00507"></a>00507 <span class="preprocessor">  #endif</span>
<a name="l00508"></a>00508 <span class="preprocessor"></span><span class="preprocessor">  #if ( CONTROLLER_VERSION == 90 )</span>
<a name="l00509"></a>00509 <span class="preprocessor"></span>    <span class="comment">/* PB13 &lt;=&gt; PHY powerdown - so clearing it is power up. */</span>
<a name="l00510"></a>00510     AT91C_BASE_PIOB-&gt;PIO_PER = 1 &lt;&lt; 13; 
<a name="l00511"></a>00511     AT91C_BASE_PIOB-&gt;PIO_OER = 1 &lt;&lt; 13;
<a name="l00512"></a>00512     AT91C_BASE_PIOB-&gt;PIO_CODR = 1 &lt;&lt; 13;
<a name="l00513"></a>00513 <span class="preprocessor">  #endif</span>
<a name="l00514"></a>00514 <span class="preprocessor"></span>
<a name="l00515"></a>00515   <span class="comment">/* After PHY power up, hardware reset. */</span>
<a name="l00516"></a>00516   AT91C_BASE_RSTC-&gt;RSTC_RMR = emacRESET_KEY | emacRESET_LENGTH;
<a name="l00517"></a>00517   AT91C_BASE_RSTC-&gt;RSTC_RCR = emacRESET_KEY | AT91C_RSTC_EXTRST;
<a name="l00518"></a>00518 
<a name="l00519"></a>00519   <span class="comment">/* Wait for hardware reset end. */</span>
<a name="l00520"></a>00520   <span class="keywordflow">while</span>( !( AT91C_BASE_RSTC-&gt;RSTC_RSR &amp; AT91C_RSTC_NRSTL ) )
<a name="l00521"></a>00521   {
<a name="l00522"></a>00522     __asm <span class="keyword">volatile</span> ( <span class="stringliteral">"NOP"</span> );
<a name="l00523"></a>00523   }
<a name="l00524"></a>00524     __asm <span class="keyword">volatile</span> ( <span class="stringliteral">"NOP"</span> );
<a name="l00525"></a>00525 
<a name="l00526"></a>00526   <span class="comment">/* Setup the pins. */</span>
<a name="l00527"></a>00527   AT91C_BASE_PIOB-&gt;PIO_ASR = emacPERIPHERAL_A_SETUP;
<a name="l00528"></a>00528   AT91C_BASE_PIOB-&gt;PIO_PDR = emacPERIPHERAL_A_SETUP;
<a name="l00529"></a>00529 
<a name="l00530"></a>00530   <span class="comment">/* Enable com between EMAC PHY.</span>
<a name="l00531"></a>00531 <span class="comment"></span>
<a name="l00532"></a>00532 <span class="comment">  Enable management port. */</span>
<a name="l00533"></a>00533   AT91C_BASE_EMAC-&gt;EMAC_NCR |= AT91C_EMAC_MPE;  
<a name="l00534"></a>00534 
<a name="l00535"></a>00535   <span class="comment">/* MDC = MCK/32. */</span>
<a name="l00536"></a>00536   AT91C_BASE_EMAC-&gt;EMAC_NCFGR |= ( 2 ) &lt;&lt; 10; 
<a name="l00537"></a>00537 
<a name="l00538"></a>00538   <span class="comment">/* Wait for PHY auto init end (rather crude delay!). */</span>
<a name="l00539"></a>00539   vTaskDelay( emacPHY_INIT_DELAY );
<a name="l00540"></a>00540 
<a name="l00541"></a>00541   <span class="comment">/* PHY configuration. */</span>
<a name="l00542"></a>00542 <span class="preprocessor">  #if USE_RMII_INTERFACE != 1</span>
<a name="l00543"></a>00543 <span class="preprocessor"></span>  {
<a name="l00544"></a>00544     <span class="keywordtype">unsigned</span> portLONG ulControl;
<a name="l00545"></a>00545 
<a name="l00546"></a>00546     <span class="comment">/* PHY has internal pull down : disable MII isolate. */</span>
<a name="l00547"></a>00547     vReadPHY( AT91C_PHY_ADDR, MII_BMCR, &amp;ulControl );
<a name="l00548"></a>00548     vReadPHY( AT91C_PHY_ADDR, MII_BMCR, &amp;ulControl );
<a name="l00549"></a>00549     ulControl &amp;= ~BMCR_ISOLATE;
<a name="l00550"></a>00550     vWritePHY( AT91C_PHY_ADDR, MII_BMCR, ulControl );
<a name="l00551"></a>00551   }
<a name="l00552"></a>00552 <span class="preprocessor">  #endif</span>
<a name="l00553"></a>00553 <span class="preprocessor"></span>
<a name="l00554"></a>00554   <span class="comment">/* Disable management port again. */</span>
<a name="l00555"></a>00555   AT91C_BASE_EMAC-&gt;EMAC_NCR &amp;= ~AT91C_EMAC_MPE;
<a name="l00556"></a>00556 
<a name="l00557"></a>00557 <span class="preprocessor">  #if USE_RMII_INTERFACE != 1</span>
<a name="l00558"></a>00558 <span class="preprocessor"></span>    <span class="comment">/* Enable EMAC in MII mode, enable clock ERXCK and ETXCK. */</span>
<a name="l00559"></a>00559     AT91C_BASE_EMAC-&gt;EMAC_USRIO = AT91C_EMAC_CLKEN ;
<a name="l00560"></a>00560 <span class="preprocessor">  #else</span>
<a name="l00561"></a>00561 <span class="preprocessor"></span>    <span class="comment">/* Enable EMAC in RMII mode, enable RMII clock (50MHz from oscillator</span>
<a name="l00562"></a>00562 <span class="comment">    on ERFCK). */</span>
<a name="l00563"></a>00563     AT91C_BASE_EMAC-&gt;EMAC_USRIO = AT91C_EMAC_RMII | AT91C_EMAC_CLKEN ;
<a name="l00564"></a>00564 <span class="preprocessor">  #endif</span>
<a name="l00565"></a>00565 <span class="preprocessor"></span>
<a name="l00566"></a>00566   <span class="comment">/* End of code supplied by Atmel ------------------------*/</span>
<a name="l00567"></a>00567 
<a name="l00568"></a>00568   <span class="comment">/* Setup the buffers and descriptors. */</span>
<a name="l00569"></a>00569   prvSetupDescriptors();
<a name="l00570"></a>00570   
<a name="l00571"></a>00571   <span class="comment">/* Load our MAC address into the EMAC. */</span>
<a name="l00572"></a>00572   prvSetupMACAddress();
<a name="l00573"></a>00573 
<a name="l00574"></a>00574   <span class="comment">/* Are we connected? */</span>
<a name="l00575"></a>00575   <span class="keywordflow">if</span>( prvProbePHY() )
<a name="l00576"></a>00576   {
<a name="l00577"></a>00577     <span class="comment">/* Enable the interrupt! */</span>
<a name="l00578"></a>00578     portENTER_CRITICAL();
<a name="l00579"></a>00579     {
<a name="l00580"></a>00580       prvSetupEMACInterrupt();
<a name="l00581"></a>00581       vPassEMACSemaphore( xSemaphore );
<a name="l00582"></a>00582     }
<a name="l00583"></a>00583     portEXIT_CRITICAL();
<a name="l00584"></a>00584   }
<a name="l00585"></a>00585 
<a name="l00586"></a>00586   <span class="keywordflow">return</span> xSemaphore;
<a name="l00587"></a>00587 }
<a name="l00588"></a>00588 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00589"></a>00589 
<a name="l00590"></a>00590 <span class="comment">/* See the header file for descriptions of public functions. */</span>
<a name="l00591"></a>00591 <span class="keywordtype">void</span> vClearEMACTxBuffer( <span class="keywordtype">void</span> )
<a name="l00592"></a>00592 {
<a name="l00593"></a>00593 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> portBASE_TYPE uxNextBufferToClear = 0;
<a name="l00594"></a>00594 
<a name="l00595"></a>00595   <span class="comment">/* Called on Tx interrupt events to reset the AT91C_TRANSMIT_OK bit in each </span>
<a name="l00596"></a>00596 <span class="comment">  Tx buffer within the frame just transmitted.  This marks all the buffers</span>
<a name="l00597"></a>00597 <span class="comment">  as available again.</span>
<a name="l00598"></a>00598 <span class="comment"></span>
<a name="l00599"></a>00599 <span class="comment">  The first buffer in the frame should have the bit set automatically. */</span>
<a name="l00600"></a>00600   <span class="keywordflow">if</span>( xTxDescriptors[ uxNextBufferToClear ].U_Status.status &amp; AT91C_TRANSMIT_OK )
<a name="l00601"></a>00601   {
<a name="l00602"></a>00602     <span class="comment">/* Loop through the other buffers in the frame. */</span>
<a name="l00603"></a>00603     <span class="keywordflow">while</span>( !( xTxDescriptors[ uxNextBufferToClear ].U_Status.status &amp; AT91C_LAST_BUFFER ) )
<a name="l00604"></a>00604     {
<a name="l00605"></a>00605       uxNextBufferToClear++;
<a name="l00606"></a>00606 
<a name="l00607"></a>00607       <span class="keywordflow">if</span>( uxNextBufferToClear &gt;= NB_TX_BUFFERS )
<a name="l00608"></a>00608       {
<a name="l00609"></a>00609         uxNextBufferToClear = 0;
<a name="l00610"></a>00610       }
<a name="l00611"></a>00611 
<a name="l00612"></a>00612       xTxDescriptors[ uxNextBufferToClear ].U_Status.status |= AT91C_TRANSMIT_OK;
<a name="l00613"></a>00613     }
<a name="l00614"></a>00614 
<a name="l00615"></a>00615     <span class="comment">/* Start with the next buffer the next time a Tx interrupt is called. */</span>
<a name="l00616"></a>00616     uxNextBufferToClear++;
<a name="l00617"></a>00617 
<a name="l00618"></a>00618     <span class="comment">/* Do we need to wrap back to the first buffer? */</span>
<a name="l00619"></a>00619     <span class="keywordflow">if</span>( uxNextBufferToClear &gt;= NB_TX_BUFFERS )
<a name="l00620"></a>00620     {
<a name="l00621"></a>00621       uxNextBufferToClear = 0;
<a name="l00622"></a>00622     }
<a name="l00623"></a>00623   }
<a name="l00624"></a>00624 }
<a name="l00625"></a>00625 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00626"></a>00626 
<a name="l00627"></a>00627 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSetupDescriptors(<span class="keywordtype">void</span>)
<a name="l00628"></a>00628 {
<a name="l00629"></a>00629 <span class="keywordtype">unsigned</span> portBASE_TYPE xIndex;
<a name="l00630"></a>00630 <span class="keywordtype">unsigned</span> portLONG ulAddress;
<a name="l00631"></a>00631 
<a name="l00632"></a>00632   <span class="comment">/* Initialise xRxDescriptors descriptor. */</span>
<a name="l00633"></a>00633   <span class="keywordflow">for</span>( xIndex = 0; xIndex &lt; NB_RX_BUFFERS; ++xIndex )
<a name="l00634"></a>00634   {
<a name="l00635"></a>00635     <span class="comment">/* Calculate the address of the nth buffer within the array. */</span>
<a name="l00636"></a>00636     ulAddress = ( <span class="keywordtype">unsigned</span> portLONG )( pcRxBuffer + ( xIndex * ETH_RX_BUFFER_SIZE ) );
<a name="l00637"></a>00637 
<a name="l00638"></a>00638     <span class="comment">/* Write the buffer address into the descriptor.  The DMA will place</span>
<a name="l00639"></a>00639 <span class="comment">    the data at this address when this descriptor is being used.  Mask off</span>
<a name="l00640"></a>00640 <span class="comment">    the bottom bits of the address as these have special meaning. */</span>
<a name="l00641"></a>00641     xRxDescriptors[ xIndex ].addr = ulAddress &amp; emacADDRESS_MASK;
<a name="l00642"></a>00642   } 
<a name="l00643"></a>00643 
<a name="l00644"></a>00644   <span class="comment">/* The last buffer has the wrap bit set so the EMAC knows to wrap back</span>
<a name="l00645"></a>00645 <span class="comment">  to the first buffer. */</span>
<a name="l00646"></a>00646   xRxDescriptors[ NB_RX_BUFFERS - 1 ].addr |= emacRX_WRAP_BIT;
<a name="l00647"></a>00647 
<a name="l00648"></a>00648   <span class="comment">/* Initialise xTxDescriptors. */</span>
<a name="l00649"></a>00649   <span class="keywordflow">for</span>( xIndex = 0; xIndex &lt; NB_TX_BUFFERS; ++xIndex )
<a name="l00650"></a>00650   {
<a name="l00651"></a>00651     <span class="comment">/* Calculate the address of the nth buffer within the array. */</span>
<a name="l00652"></a>00652     ulAddress = ( <span class="keywordtype">unsigned</span> portLONG )( pcTxBuffer + ( xIndex * ETH_TX_BUFFER_SIZE ) );
<a name="l00653"></a>00653 
<a name="l00654"></a>00654     <span class="comment">/* Write the buffer address into the descriptor.  The DMA will read</span>
<a name="l00655"></a>00655 <span class="comment">    data from here when the descriptor is being used. */</span>
<a name="l00656"></a>00656     xTxDescriptors[ xIndex ].addr = ulAddress &amp; emacADDRESS_MASK;
<a name="l00657"></a>00657     xTxDescriptors[ xIndex ].U_Status.status = AT91C_TRANSMIT_OK;
<a name="l00658"></a>00658   } 
<a name="l00659"></a>00659 
<a name="l00660"></a>00660   <span class="comment">/* The last buffer has the wrap bit set so the EMAC knows to wrap back</span>
<a name="l00661"></a>00661 <span class="comment">  to the first buffer. */</span>
<a name="l00662"></a>00662   xTxDescriptors[ NB_TX_BUFFERS - 1 ].U_Status.status = AT91C_TRANSMIT_WRAP | AT91C_TRANSMIT_OK;
<a name="l00663"></a>00663 
<a name="l00664"></a>00664   <span class="comment">/* Tell the EMAC where to find the descriptors. */</span>
<a name="l00665"></a>00665   AT91C_BASE_EMAC-&gt;EMAC_RBQP = ( <span class="keywordtype">unsigned</span> portLONG ) xRxDescriptors;
<a name="l00666"></a>00666   AT91C_BASE_EMAC-&gt;EMAC_TBQP = ( <span class="keywordtype">unsigned</span> portLONG ) xTxDescriptors;
<a name="l00667"></a>00667   
<a name="l00668"></a>00668   <span class="comment">/* Clear all the bits in the receive status register. */</span>
<a name="l00669"></a>00669   AT91C_BASE_EMAC-&gt;EMAC_RSR = ( AT91C_EMAC_OVR | AT91C_EMAC_REC | AT91C_EMAC_BNA );
<a name="l00670"></a>00670 
<a name="l00671"></a>00671   <span class="comment">/* Enable the copy of data into the buffers, ignore broadcasts, </span>
<a name="l00672"></a>00672 <span class="comment">  and don't copy FCS. */</span>
<a name="l00673"></a>00673   AT91C_BASE_EMAC-&gt;EMAC_NCFGR |= ( AT91C_EMAC_CAF | AT91C_EMAC_NBC | AT91C_EMAC_DRFCS);
<a name="l00674"></a>00674 
<a name="l00675"></a>00675   <span class="comment">/* Enable Rx and Tx, plus the stats register. */</span>
<a name="l00676"></a>00676   AT91C_BASE_EMAC-&gt;EMAC_NCR |= ( AT91C_EMAC_TE | AT91C_EMAC_RE | AT91C_EMAC_WESTAT );
<a name="l00677"></a>00677 } 
<a name="l00678"></a>00678 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00679"></a>00679 
<a name="l00680"></a>00680 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSetupMACAddress( <span class="keywordtype">void</span> )
<a name="l00681"></a>00681 {
<a name="l00682"></a>00682   <span class="comment">/* Must be written SA1L then SA1H. */</span>
<a name="l00683"></a>00683   <span class="comment">/* MakingThings: Switch variables to load from */</span>
<a name="l00684"></a>00684   AT91C_BASE_EMAC-&gt;EMAC_SA1L =  ( ( <span class="keywordtype">unsigned</span> portLONG ) emacETHADDR3 &lt;&lt; 24 ) |
<a name="l00685"></a>00685                   ( ( <span class="keywordtype">unsigned</span> portLONG ) emacETHADDR2 &lt;&lt; 16 ) |
<a name="l00686"></a>00686                   ( ( <span class="keywordtype">unsigned</span> portLONG ) emacETHADDR1 &lt;&lt; 8  ) |
<a name="l00687"></a>00687                   emacETHADDR0;
<a name="l00688"></a>00688 
<a name="l00689"></a>00689   AT91C_BASE_EMAC-&gt;EMAC_SA1H =  ( ( <span class="keywordtype">unsigned</span> portLONG ) emacETHADDR5 &lt;&lt; 8 ) |
<a name="l00690"></a>00690                   emacETHADDR4;
<a name="l00691"></a>00691 }
<a name="l00692"></a>00692 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00693"></a>00693 
<a name="l00694"></a>00694 <span class="keyword">static</span> <span class="keywordtype">void</span> prvSetupEMACInterrupt( <span class="keywordtype">void</span> )
<a name="l00695"></a>00695 {
<a name="l00696"></a>00696   <span class="comment">/* Create the semaphore used to trigger the EMAC task. */</span>
<a name="l00697"></a>00697   vSemaphoreCreateBinary( xSemaphore );
<a name="l00698"></a>00698   <span class="keywordflow">if</span>( xSemaphore )
<a name="l00699"></a>00699   {
<a name="l00700"></a>00700     <span class="comment">/* We start by 'taking' the semaphore so the ISR can 'give' it when the</span>
<a name="l00701"></a>00701 <span class="comment">    first interrupt occurs. */</span>
<a name="l00702"></a>00702     xSemaphoreTake( xSemaphore, emacNO_DELAY );
<a name="l00703"></a>00703     portENTER_CRITICAL();
<a name="l00704"></a>00704     {
<a name="l00705"></a>00705       <span class="comment">/* We want to interrupt on Rx and Tx events. */</span>
<a name="l00706"></a>00706       AT91C_BASE_EMAC-&gt;EMAC_IER = AT91C_EMAC_RCOMP | AT91C_EMAC_TCOMP;
<a name="l00707"></a>00707 
<a name="l00708"></a>00708       <span class="comment">/* Enable the interrupts in the AIC. */</span>
<a name="l00709"></a>00709       AT91F_AIC_ConfigureIt( AT91C_ID_EMAC, emacINTERRUPT_LEVEL, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, ( <span class="keywordtype">void</span> (*)( <span class="keywordtype">void</span> ) ) vEMACISR_Wrapper );
<a name="l00710"></a>00710             AT91C_BASE_AIC-&gt;AIC_IECR = 0x1 &lt;&lt; AT91C_ID_EMAC;
<a name="l00711"></a>00711     }
<a name="l00712"></a>00712     portEXIT_CRITICAL();
<a name="l00713"></a>00713   }
<a name="l00714"></a>00714 }
<a name="l00715"></a>00715 
<a name="l00716"></a>00716 
<a name="l00717"></a>00717 
<a name="l00718"></a>00718 
<a name="l00719"></a>00719 
<a name="l00720"></a>00720 <span class="comment">/*</span>
<a name="l00721"></a>00721 <span class="comment"> * The following functions are initialisation functions taken from the Atmel</span>
<a name="l00722"></a>00722 <span class="comment"> * EMAC sample code.</span>
<a name="l00723"></a>00723 <span class="comment"> */</span>
<a name="l00724"></a>00724 
<a name="l00725"></a>00725 
<a name="l00726"></a>00726 <span class="keyword">static</span> portBASE_TYPE prvProbePHY( <span class="keywordtype">void</span> )
<a name="l00727"></a>00727 {
<a name="l00728"></a>00728 <span class="keywordtype">unsigned</span> portLONG ulPHYId1, ulPHYId2, ulStatus;
<a name="l00729"></a>00729 portBASE_TYPE xReturn = pdPASS;
<a name="l00730"></a>00730   
<a name="l00731"></a>00731   <span class="comment">/* Code supplied by Atmel (reformatted) -----------------*/</span>
<a name="l00732"></a>00732 
<a name="l00733"></a>00733   <span class="comment">/* Enable management port */</span>
<a name="l00734"></a>00734   AT91C_BASE_EMAC-&gt;EMAC_NCR |= AT91C_EMAC_MPE;  
<a name="l00735"></a>00735     AT91C_BASE_EMAC-&gt;EMAC_NCFGR |= ( 2 ) &lt;&lt; 10;
<a name="l00736"></a>00736 
<a name="l00737"></a>00737   <span class="comment">/* Read the PHY ID. */</span>
<a name="l00738"></a>00738   vReadPHY( AT91C_PHY_ADDR, MII_PHYSID1, &amp;ulPHYId1 );
<a name="l00739"></a>00739   vReadPHY(AT91C_PHY_ADDR, MII_PHYSID2, &amp;ulPHYId2 );
<a name="l00740"></a>00740 
<a name="l00741"></a>00741   <span class="comment">/* AMD AM79C875:</span>
<a name="l00742"></a>00742 <span class="comment">      PHY_ID1 = 0x0022</span>
<a name="l00743"></a>00743 <span class="comment">      PHY_ID2 = 0x5541</span>
<a name="l00744"></a>00744 <span class="comment">      Bits 3:0 Revision Number Four bit manufacturer?s revision number.</span>
<a name="l00745"></a>00745 <span class="comment">        0001 stands for Rev. A, etc.</span>
<a name="l00746"></a>00746 <span class="comment">  */</span>
<a name="l00747"></a>00747   <span class="keywordflow">if</span>( ( ( ulPHYId1 &lt;&lt; 16 ) | ( ulPHYId2 &amp; 0xfff0 ) ) != MII_DM9161_ID )
<a name="l00748"></a>00748   {
<a name="l00749"></a>00749     <span class="comment">/* Did not expect this ID. */</span>
<a name="l00750"></a>00750     xReturn = pdFAIL;
<a name="l00751"></a>00751   }
<a name="l00752"></a>00752   <span class="keywordflow">else</span>
<a name="l00753"></a>00753   {
<a name="l00754"></a>00754     ulStatus = xGetLinkSpeed();
<a name="l00755"></a>00755 
<a name="l00756"></a>00756     <span class="keywordflow">if</span>( ulStatus != pdPASS )
<a name="l00757"></a>00757     {
<a name="l00758"></a>00758       xReturn = pdFAIL;
<a name="l00759"></a>00759     }
<a name="l00760"></a>00760   }
<a name="l00761"></a>00761 
<a name="l00762"></a>00762   <span class="comment">/* Disable management port */</span>
<a name="l00763"></a>00763   AT91C_BASE_EMAC-&gt;EMAC_NCR &amp;= ~AT91C_EMAC_MPE; 
<a name="l00764"></a>00764 
<a name="l00765"></a>00765   <span class="comment">/* End of code supplied by Atmel ------------------------*/</span>
<a name="l00766"></a>00766 
<a name="l00767"></a>00767   <span class="keywordflow">return</span> xReturn;
<a name="l00768"></a>00768 }
<a name="l00769"></a>00769 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00770"></a>00770 
<a name="l00771"></a>00771 <span class="keyword">static</span> <span class="keywordtype">void</span> vReadPHY( <span class="keywordtype">unsigned</span> portCHAR ucPHYAddress, <span class="keywordtype">unsigned</span> portCHAR ucAddress, <span class="keywordtype">unsigned</span> portLONG *pulValue )
<a name="l00772"></a>00772 {
<a name="l00773"></a>00773   <span class="comment">/* Code supplied by Atmel (reformatted) ----------------------*/</span>
<a name="l00774"></a>00774 
<a name="l00775"></a>00775   AT91C_BASE_EMAC-&gt;EMAC_MAN =   (AT91C_EMAC_SOF &amp; (0x01&lt;&lt;30))
<a name="l00776"></a>00776                   | (2 &lt;&lt; 16) | (2 &lt;&lt; 28)
<a name="l00777"></a>00777                   | ((ucPHYAddress &amp; 0x1f) &lt;&lt; 23)
<a name="l00778"></a>00778                   | (ucAddress &lt;&lt; 18);
<a name="l00779"></a>00779 
<a name="l00780"></a>00780   <span class="comment">/* Wait until IDLE bit in Network Status register is cleared. */</span>
<a name="l00781"></a>00781   <span class="keywordflow">while</span>( !( AT91C_BASE_EMAC-&gt;EMAC_NSR &amp; AT91C_EMAC_IDLE ) )
<a name="l00782"></a>00782   {
<a name="l00783"></a>00783     __asm( <span class="stringliteral">"NOP"</span> );
<a name="l00784"></a>00784   }
<a name="l00785"></a>00785 
<a name="l00786"></a>00786   *pulValue = ( AT91C_BASE_EMAC-&gt;EMAC_MAN &amp; 0x0000ffff ); 
<a name="l00787"></a>00787 
<a name="l00788"></a>00788   <span class="comment">/* End of code supplied by Atmel ------------------------*/</span>
<a name="l00789"></a>00789 }
<a name="l00790"></a>00790 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00791"></a>00791 
<a name="l00792"></a>00792 <span class="preprocessor">#if USE_RMII_INTERFACE != 1</span>
<a name="l00793"></a>00793 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keywordtype">void</span> vWritePHY( <span class="keywordtype">unsigned</span> portCHAR ucPHYAddress, <span class="keywordtype">unsigned</span> portCHAR ucAddress, <span class="keywordtype">unsigned</span> portLONG ulValue )
<a name="l00794"></a>00794 {
<a name="l00795"></a>00795   <span class="comment">/* Code supplied by Atmel (reformatted) ----------------------*/</span>
<a name="l00796"></a>00796 
<a name="l00797"></a>00797   AT91C_BASE_EMAC-&gt;EMAC_MAN = (( AT91C_EMAC_SOF &amp; (0x01&lt;&lt;30))
<a name="l00798"></a>00798                 | (2 &lt;&lt; 16) | (1 &lt;&lt; 28)
<a name="l00799"></a>00799                 | ((ucPHYAddress &amp; 0x1f) &lt;&lt; 23)
<a name="l00800"></a>00800                 | (ucAddress &lt;&lt; 18))
<a name="l00801"></a>00801                 | (ulValue &amp; 0xffff);
<a name="l00802"></a>00802 
<a name="l00803"></a>00803   <span class="comment">/* Wait until IDLE bit in Network Status register is cleared */</span>
<a name="l00804"></a>00804   <span class="keywordflow">while</span>( !( AT91C_BASE_EMAC-&gt;EMAC_NSR &amp; AT91C_EMAC_IDLE ) )
<a name="l00805"></a>00805   {
<a name="l00806"></a>00806     __asm( <span class="stringliteral">"NOP"</span> );
<a name="l00807"></a>00807   };
<a name="l00808"></a>00808 
<a name="l00809"></a>00809   <span class="comment">/* End of code supplied by Atmel ------------------------*/</span>
<a name="l00810"></a>00810 }
<a name="l00811"></a>00811 <span class="preprocessor">#endif</span>
<a name="l00812"></a>00812 <span class="preprocessor"></span><span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00813"></a>00813 
<a name="l00814"></a>00814 <span class="keyword">static</span> portBASE_TYPE xGetLinkSpeed( <span class="keywordtype">void</span> )
<a name="l00815"></a>00815 {
<a name="l00816"></a>00816   <span class="keywordtype">unsigned</span> portLONG ulBMSR, ulBMCR, ulLPA, ulMACCfg, ulSpeed, ulDuplex;
<a name="l00817"></a>00817 
<a name="l00818"></a>00818   <span class="comment">/* Code supplied by Atmel (reformatted) -----------------*/</span>
<a name="l00819"></a>00819 
<a name="l00820"></a>00820   <span class="comment">/* Link status is latched, so read twice to get current value */</span>
<a name="l00821"></a>00821   vReadPHY(AT91C_PHY_ADDR, MII_BMSR, &amp;ulBMSR);
<a name="l00822"></a>00822   vReadPHY(AT91C_PHY_ADDR, MII_BMSR, &amp;ulBMSR);
<a name="l00823"></a>00823 
<a name="l00824"></a>00824   <span class="keywordflow">if</span>( !( ulBMSR &amp; BMSR_LSTATUS ) )
<a name="l00825"></a>00825   { 
<a name="l00826"></a>00826     <span class="comment">/* No Link. */</span>
<a name="l00827"></a>00827     <span class="keywordflow">return</span> pdFAIL;
<a name="l00828"></a>00828   }
<a name="l00829"></a>00829 
<a name="l00830"></a>00830   vReadPHY(AT91C_PHY_ADDR, MII_BMCR, &amp;ulBMCR);
<a name="l00831"></a>00831   <span class="keywordflow">if</span> (ulBMCR &amp; BMCR_ANENABLE)
<a name="l00832"></a>00832   {       
<a name="l00833"></a>00833     <span class="comment">/* AutoNegotiation is enabled. */</span>
<a name="l00834"></a>00834     <span class="keywordflow">if</span> (!(ulBMSR &amp; BMSR_ANEGCOMPLETE))
<a name="l00835"></a>00835     {
<a name="l00836"></a>00836       <span class="comment">/* Auto-negotitation in progress. */</span>
<a name="l00837"></a>00837       <span class="keywordflow">return</span> pdFAIL;        
<a name="l00838"></a>00838     }   
<a name="l00839"></a>00839 
<a name="l00840"></a>00840     vReadPHY(AT91C_PHY_ADDR, MII_LPA, &amp;ulLPA);
<a name="l00841"></a>00841     <span class="keywordflow">if</span>( ( ulLPA &amp; LPA_100FULL ) || ( ulLPA &amp; LPA_100HALF ) )
<a name="l00842"></a>00842     {
<a name="l00843"></a>00843       ulSpeed = SPEED_100;
<a name="l00844"></a>00844     }
<a name="l00845"></a>00845     <span class="keywordflow">else</span>
<a name="l00846"></a>00846     {
<a name="l00847"></a>00847       ulSpeed = SPEED_10;
<a name="l00848"></a>00848     }
<a name="l00849"></a>00849 
<a name="l00850"></a>00850     <span class="keywordflow">if</span>( ( ulLPA &amp; LPA_100FULL ) || ( ulLPA &amp; LPA_10FULL ) )
<a name="l00851"></a>00851     {
<a name="l00852"></a>00852       ulDuplex = DUPLEX_FULL;
<a name="l00853"></a>00853     }
<a name="l00854"></a>00854     <span class="keywordflow">else</span>
<a name="l00855"></a>00855     {
<a name="l00856"></a>00856       ulDuplex = DUPLEX_HALF;
<a name="l00857"></a>00857     }
<a name="l00858"></a>00858   }
<a name="l00859"></a>00859   <span class="keywordflow">else</span>
<a name="l00860"></a>00860   {
<a name="l00861"></a>00861     ulSpeed = ( ulBMCR &amp; BMCR_SPEED100 ) ? SPEED_100 : SPEED_10;
<a name="l00862"></a>00862     ulDuplex = ( ulBMCR &amp; BMCR_FULLDPLX ) ? DUPLEX_FULL : DUPLEX_HALF;
<a name="l00863"></a>00863   }
<a name="l00864"></a>00864 
<a name="l00865"></a>00865   <span class="comment">/* Update the MAC */</span>
<a name="l00866"></a>00866   ulMACCfg = AT91C_BASE_EMAC-&gt;EMAC_NCFGR &amp; ~( AT91C_EMAC_SPD | AT91C_EMAC_FD );
<a name="l00867"></a>00867   <span class="keywordflow">if</span>( ulSpeed == SPEED_100 )
<a name="l00868"></a>00868   {
<a name="l00869"></a>00869     <span class="keywordflow">if</span>( ulDuplex == DUPLEX_FULL )
<a name="l00870"></a>00870     {
<a name="l00871"></a>00871       <span class="comment">/* 100 Full Duplex */</span>
<a name="l00872"></a>00872       AT91C_BASE_EMAC-&gt;EMAC_NCFGR = ulMACCfg | AT91C_EMAC_SPD | AT91C_EMAC_FD;
<a name="l00873"></a>00873     }
<a name="l00874"></a>00874     <span class="keywordflow">else</span>
<a name="l00875"></a>00875     {         
<a name="l00876"></a>00876       <span class="comment">/* 100 Half Duplex */</span>
<a name="l00877"></a>00877       AT91C_BASE_EMAC-&gt;EMAC_NCFGR = ulMACCfg | AT91C_EMAC_SPD;
<a name="l00878"></a>00878     }
<a name="l00879"></a>00879   }
<a name="l00880"></a>00880   <span class="keywordflow">else</span>
<a name="l00881"></a>00881   {
<a name="l00882"></a>00882     <span class="keywordflow">if</span> (ulDuplex == DUPLEX_FULL)
<a name="l00883"></a>00883     {
<a name="l00884"></a>00884       <span class="comment">/* 10 Full Duplex */</span>
<a name="l00885"></a>00885       AT91C_BASE_EMAC-&gt;EMAC_NCFGR = ulMACCfg | AT91C_EMAC_FD;
<a name="l00886"></a>00886     }
<a name="l00887"></a>00887     <span class="keywordflow">else</span>
<a name="l00888"></a>00888     {     <span class="comment">/* 10 Half Duplex */</span>
<a name="l00889"></a>00889       AT91C_BASE_EMAC-&gt;EMAC_NCFGR = ulMACCfg;
<a name="l00890"></a>00890     }
<a name="l00891"></a>00891   }
<a name="l00892"></a>00892 
<a name="l00893"></a>00893   <span class="comment">/* End of code supplied by Atmel ------------------------*/</span>
<a name="l00894"></a>00894 
<a name="l00895"></a>00895   <span class="keywordflow">return</span> pdPASS;
<a name="l00896"></a>00896 }
<a name="l00897"></a>00897 <span class="comment">/*-----------------------------------------------------------*/</span>
<a name="l00898"></a>00898 
<a name="l00899"></a>00899 <span class="keywordtype">void</span> vEMACWaitForInput( <span class="keywordtype">void</span> )
<a name="l00900"></a>00900 {
<a name="l00901"></a>00901   <span class="comment">/* Just wait until we are signled from an ISR that data is available, or</span>
<a name="l00902"></a>00902 <span class="comment">  we simply time out. */</span>
<a name="l00903"></a>00903   xSemaphoreTake( xSemaphore, emacBLOCK_TIME_WAITING_FOR_INPUT );
<a name="l00904"></a>00904 }
<a name="l00905"></a>00905 
<a name="l00906"></a>00906 <span class="preprocessor">#endif // MAKE_CTRL_NETWORK</span>
</pre></div><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Make Controller Kit</title>
<style type="text/css">
<!--
.footer {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 9pt;
	color: #999999;
}
-->
</style>
</head>

<body>
<hr size="1">
<div>
  <p class="footer">The Make Controller Kit is an open source project maintained by <a href="http://www.makingthings.com">MakingThings</a>.<br />
    MakingThings code is released under the <a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">Apache 2.0 license</a>.<br />
    Bug tracker, development wiki and status can be found at <a href="http://dev.makingthings.com">http://dev.makingthings.com</a>.<br />
		This document was last updated on 5 Dec 2007.
</p>
</div>
<!-- Google Analytics Code -->
<script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
</script>
<script type="text/javascript">
_uacct = "UA-769030-1";
urchinTracker();
</script>
</body>
</html>
